Welcome to apply and using the “iGMAS Analysis Center of Shanghai Astronomical Observatory, Chinese Academy of Science & IGS Real-time Data Stream Forwarding Center "data sharing platform.The purpose of this data shared platform is to monitor the service performance and the signal quality of the GNSS system, to serve the global GNSS users, also provide scientific data support for national major strategies, space system science research, higher education and the public simultaneously, thus to comprehensively promote the scientific data sharing of spatial systems. In order to maintain online public order and safety, social stability, please read and comply with the following terms：

1. Comply with the National Internet use laws and regulations. It is forbidden to use the site endangering national security, disclosure of state secrets. Forbidden to violate the national community collective, the legitimate rights and interests of citizens. Forbidden to use this site to produce, copy, disseminate all illegal and contrary to social morality information.

2.When the data users of iGMAS Analysis Center of Shanghai Astronomical Observatory get any form of results, including published scientific papers, books, data products and unpublished research reports, systems development and any other achievements, as well as results and declare awards, development and application, etc., should strictly abide by the relevant national safety and intellectual property requirements, clearly indicate the data source. Noting: We acknowledge the use of data from iGMAS Analysis Center of Shanghai Astronomical Observatory, Chinese Academy of Sciences.

3.Without the written authorization of the iGMAS Analysis Center of the Shanghai Astronomical Observatory & IGS Real-time Data Stream Forwarding Center, the data users shall not, in any way, provide the data of the iGMAS Analysis Center of the Shanghai Astronomical Observatory & IGS Real-time Data Stream Forwarding Center to other countries, units and individuals. For the users who need professional data exchange and local distribution (Such as campus network sharing, re-distribution within the unit or department, etc.) should approval by the Shanghai Observatory iGMAS Analysis Center for approval, and signed the relevant entrustment agreement.

4.If the users provided false information or use illegal access to get account and password, once verified, the user will bear all the consequences within the scope of the law.

5.iGMAS analysis center of Shanghai Astronomical Observatory, Chinese Academy of Sciences & IGS Real-time Data Stream Forwarding Center reserve all the right for the final interpretation.